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Organ pipe sound source

  1. Nov 28, 2017 #1
    1. The problem statement, all variables and given/known data
    Organ pipe sound is driven by a compressed air jet flicking alternately in and out of the pipe in step with the fundamental frequency. My question is whether sound waves of the higher frequency harmonic series are emitted during the intervals when the jet is outside of the pipe and not contributing energy to the system, and if so, what drives them?

    Thank you.

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Nov 28, 2017 #2

    haruspex

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    What determines the fundamental frequency? Think about why the jet should flick in and out at that frequency.
     
  4. Dec 4, 2017 #3

    PeterO

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    I think you are forgetting how the Organ pipe sounds. Remember resonance. The air can flick in and out at any rate at all, but you only get resonance with specific frequencies (fundamental and overtones), so you only hear specific frequencies sounding.
     
  5. Dec 4, 2017 #4

    haruspex

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    Not sure how you mean that. As I hinted, it flicks in and out at the rate it does for a reason. Understanding that reason is key to answering the question.
     
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